557489791 has 2 divisors, whose sum is σ = 557489792. Its totient is φ = 557489790.

The previous prime is 557489783. The next prime is 557489813. The reversal of 557489791 is 197984755.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 557489791 - 2³ = 557489783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557489731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278744895 + 278744896.

It is an arithmetic number, because the mean of its divisors is an integer number (278744896).

Almost surely, 2^557489791 is an apocalyptic number.

557489791 is a deficient number, since it is larger than the sum of its proper divisors (1).

557489791 is an equidigital number, since it uses as much as digits as its factorization.

557489791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3175200, while the sum is 55.

The square root of 557489791 is about 23611.2217176494. The cubic root of 557489791 is about 823.0236333308.

The spelling of 557489791 in words is "five hundred fifty-seven million, four hundred eighty-nine thousand, seven hundred ninety-one".